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The replacement fertility rate is 2.1 births per female for most developed countries (in the United Kingdom, for example), but can be as high as 3.5 in undeveloped countries because of higher mortality rates, especially child mortality. [11]
A 2023 map of countries by fertility rate. Blue indicates negative fertility rates. Red indicates positive rates. The total fertility rate (TFR) of a population is the average number of children that are born to a woman over her lifetime, if they were to experience the exact current age-specific fertility rates (ASFRs) through their lifetime, and they were to live from birth until the end of ...
Tubal infertility, in which there is a structural problem with the fallopian tubes is responsible for 11-67% of infertility in women of child bearing age, with the large range in prevalence due to different populations studied. [2]
A study of a population of French women from 1670 and 1789 shows that those who married at age 20–24 had 7.0 children on average and 3.7% remained childless. Women who married at age 25–29 years had a mean of 5.7 children and 5.0% remained childless. Women who married at 30–34 years had a mean of 4.0 children and 8.2% remained childless. [20]
In medicine, fertility refers to the ability to have children, and infertility refers to difficulty in reproducing naturally. [4] In general, infertility or subfertility [ 5 ] in humans is defined as not being able to conceive a child after one year (or longer) of unprotected sex . [ 6 ]
The prevalence of primary infertility has increased since 1990, but secondary infertility has decreased overall. Rates decreased (although not prevalence) of female infertility in high-income, Central/Eastern Europe, and Central Asia regions. [2] Female infertility is prevalent across the globe.
A report by Save the Children found that, annually, 13 million children are born to women under age 20 worldwide. More than 90% of these births occur to women living in developing countries . Complications of pregnancy and childbirth are the leading cause of mortality among women between the ages of 15 and 19 in such areas, as they are the ...
Contraceptive prevalence among (15–19 years) remains low at 14% in 2015 when compared to the national prevalence among the reproductive age group (15–49 years) at 25% in the same year. [106] Types of contraceptives